What if there is a bug in the notebook keyboard?

First of all, it is estimated that your laptop keyboard has leaked drinks or left food residue.

I recommend several ways:

1, remove the keyboard of the notebook and clean it thoroughly. Actually, it's very easy. The notebook keyboard can come down with a hard dig, but be careful not to break the connecting wire.

If you are afraid to do it, you can try it: find a long-haired brush, a hair dryer and a little anhydrous alcohol. Use a brush dipped in a little alcohol to clean the gap in the keyboard, then blow it with a hair dryer and dry it. Although not as clean as the first one, it is simple.